Claude Pro：Opus 模型仅在启用额外使用时可用。

Claude Pro：Opus 模型仅在启用额外使用时可用。
Claude Pro: Opus model will only be available if extra usage is enabled

原始链接: https://support.claude.com/en/articles/11940350-claude-code-model-configuration

## 在 Claude Code 中更换模型本指南详细介绍了在 Claude Code 中选择不同 Claude 模型的三种方法。最快的方法是在 Claude Code *内部* 使用 `/model` 命令，可以即时更改 – 使用 `/status` 检查当前模型。对于会话期间的一次性模型更改，请在从终端启动 Claude Code 时使用 `--model` 标志（例如，`claude --model claude-opus-4-7`）。要设置永久默认模型，请修改您的 shell 配置文件（macOS 上的 `.zshrc`，或 Linux 上的 `.bashrc`）。添加一行，例如 `export ANTHROPIC_MODEL="claude-opus-4-7"`，然后 source 该文件（Bash 的 `source ~/.bashrc`），并重新启动您的终端。支持的模型包括 Opus 4.7、Sonnet 4.6、Opus 4.6、Opus 4.5、Haiku 4.5 和 Sonnet 4.5，每个模型都有一个特定的模型名称用于命令。这使您可以根据您的特定需求和偏好定制 Claude Code。

## Claude Pro Opus 模型访问更新最近在Hacker News上的讨论澄清了关于Claude Pro计划中访问Anthropic的Opus模型的问题。最初，一个支持页面显示即使订阅了Pro计划，访问Opus也需要额外购买使用量。然而，Anthropic的代表表示这篇文章已过时，Opus 4.5已于一月份推广到Pro计划中。尽管如此，当前的在线支持页面仍然显示需要额外购买使用量才能访问Claude Code中的Opus。用户指出这种模糊性以及存档链接加载缓慢的问题。更广泛的讨论表明，人工智能模型的资金来源正在发生转变。投资者可能会从补贴推理成本（运行模型）转向资助*使用*模型的企业，专注于可证明的人工智能价值。人们也担心Opus的高成本可能会促使用户转向自托管的开源模型——尽管对来自中国的模型存在潜在的信任障碍。最终，Anthropic需要证明其持续的价值以证明其定价是合理的。

原文

This guide shows you three ways to change which Claude model you're using with Claude Code: the quick /model command for instant changes, the --model flag for one-time session changes, and environment variables to set your preferred model as the permanent default.

Easiest method: Use /model command

The simplest way to change models is to use the /model command directly within Claude Code. This works immediately without restarting your terminal.

Start Claude Code: claude
Type /model and choose your desired model from the interactive menu.
Your model change takes effect immediately.

Note: You can check your current model anytime by running /status in Claude Code.

Supported models

Opus 4.7, claude-opus-4-7
Sonnet 4.6, claude-sonnet-4-6
Opus 4.6, claude-opus-4-6
Opus 4.5, claude-opus-4-5-20251101
Haiku 4.5, claude-haiku-4-5-20251001
Sonnet 4.5, claude-sonnet-4-5-20250929

Change model for current session only

Use the --model flag when starting Claude Code.

Start a fresh Terminal session.
Enter the following commands (depending on the model you’d like to use for that session):
- For Opus 4.7: claude --model claude-opus-4-7
- For Sonnet 4.6: claude --model claude-sonnet-4-6
- For Opus 4.6: claude --model claude-opus-4-6
- For Opus 4.5: claude --model claude-opus-4-5-20251101
- For Haiku 4.5: claude --model claude-haiku-4-5-20251001
- For Sonnet 4.5: claude --model claude-sonnet-4-5-20250929

Change default model for all future sessions

Step 1) Check your shell type by running: echo $SHELL

/bin/zsh → You're using zsh (macOS default)
/bin/bash → You're using bash (Linux default)

Step 2) Add model setting to your shell config:

For ZSH users (macOS)

Opus 4.7: echo 'export ANTHROPIC_MODEL="claude-opus-4-7"' >> ~/.zshrc
Sonnet 4.6: echo 'export ANTHROPIC_MODEL="claude-sonnet-4-6"' >> ~/.zshrc
Opus 4.6: echo 'export ANTHROPIC_MODEL="claude-opus-4-6"' >> ~/.zshrc
Opus 4.5: echo 'export ANTHROPIC_MODEL="claude-opus-4-5-20251101"' >> ~/.zshrc
Haiku 4.5: echo 'export ANTHROPIC_MODEL="claude-haiku-4-5-20251001"' >> ~/.zshrc
Sonnet 4.5: echo 'export ANTHROPIC_MODEL="claude-sonnet-4-5-20250929"' >> ~/.zshrc

For BASH users (Linux)

Opus 4.7: echo 'export ANTHROPIC_MODEL="claude-opus-4-7"' >> ~/.bashrc
Sonnet 4.6: echo 'export ANTHROPIC_MODEL="claude-sonnet-4-6"' >> ~/.bashrc
Opus 4.6: echo 'export ANTHROPIC_MODEL="claude-opus-4-6"' >> ~/.bashrc
Opus 4.5: echo 'export ANTHROPIC_MODEL="claude-opus-4-5-20251101"' >> ~/.bashrc
Haiku 4.5: echo 'export ANTHROPIC_MODEL="claude-haiku-4-5-20251001"' >> ~/.bashrc
Sonnet 4.5: echo 'export ANTHROPIC_MODEL="claude-sonnet-4-5-20250929"' >> ~/.bashrc

Step 3) Apply the changes:

For BASH: source ~/.bashrc

Step 4) Close Terminal completely, then reopen it.

Step 5) Start Claude Code in a fresh Terminal session: claude.

Now your chosen model will be the default for all future Claude Code sessions.

How up-to-date is Claude's training data?

How large is the Claude API’s context window?

Using Claude in Microsoft Foundry

Model availability in Claude for Government

Models, usage, and limits in Claude Code